86,765 research outputs found
Sovereign debt and reserves with liquidity and productivity crises
No full textDuring the recent financial crisis, emerging economies have kept
accumulating both sovereign reserves and debt. To account for this
empirical fact, we model the optimal portfolio choice of a sovereign that is subject to liquidity and productivity shocks. We
determine the equilibrium level of debt and its cost by solving a contracting game between sovereign and international lenders. Although
raising debt increases the sovereign exposure to liquidity and productivity crises, the simultaneous accumulation of reserves can
mitigate the negative effects of such crises. This mechanism rationalizes the complementarity between debt and reserves
Augmented Reality and Deep Learning towards the Management of Secondary Building Assets
No full textThe retrieval of as-is information for existing buildings is a prerequisite for effectively operating facilities, through the creation or updating of Building/Asset Information Models (BIM/AIM), or Digital Twins. At present, many studies focus on the capture of geometry for the modelling of primary components, overlooking the fact that many recurring actions need to be conducted on assets inside buildings. Furthermore, highly accurate survey techniques like laser scanning need long offsite processing for object recognition. Performing such process on site would dramatically impact efficiency and also prevent the need to revisit the site in the case of insufficient/incomplete data. In this paper, an Augmented Reality (AR) system is proposed enabling inventory, information retrieval and information update directly on-site. It would reduce post-processing work and avoid loss of information and unreliability of data. The system has a Head-Mounted Display (HMD) AR interface that lets the technician interact handsfree with the real world and digital information contained in the BIM/AIM. A trained Deep Learning Neural Network operates the automatic recognition of objects in the field of view of the user and their placement into the digital BIM. In this paper, two uses cases are described: one is the inventory of small assets inside buildings to populate a BIM/AIM, and the second is the retrieval of relevant information from the AIM to support maintenance operations. Partial development and feasibility tests of the first use case applied to fire extinguishers, have been carried out to assess the feasibility and value of this system
Blockchain based choreographies: The construction industry case study
No full textBPMN choreography is a modeling language capable to describe scenarios where several independent participants have to collaborate in a climate of opposing interests and therefore are forced to trust each other. For this reason, in many contexts, a strong need for transparency, responsibility, and choreography compliance arise by the various participants. Blockchains and smart contracts, thanks to their characteristic of providing a decentralized and consensus-based validation mechanism, seem to be able to meet these needs in an untrusted scenario. Nevertheless, most of the related work focused either on transparency, accountability, or compliance, but none on all three of them. Furthermore, such works do not take into account the nondeterministc nature of choreographies. This work aims at using blockchains and smart contracts in this scenario providing a formally well-defined set of tools to match all three the aforementioned requirements. This work applies the proposed techniques to a case study from the construction industry, an economical relevant application domain where the demand for transparency, accountability, and compliance with procurement contracts (that can be modeled as choreographies) is very strong
Historie van het leuen der heyliger Maechden Harlindis ende Relindis, vvt de legende int cortste ende ghetrouvvelijckste ouergestelt.
No full textAuteurschap onzekerDierick de Linden ... Anthonis Corneli ... hebben in druck laten vvtgaen f. E3v].Bib. Belgica (1964-1970 éd.) ; H 210Cockx-Indestege, E. Belgica typographica ; 8500Machiels, J. Catalogus van de boeken gedrukt vóór 1600 ; H 30Europeana-GoogleBook
Augmented Reality Application Supporting On-Site Secondary Building Assets Management
No full textSecondary building assets management requires a large amount of information related to them. Nevertheless, building assets surveysare cost and time demanding, especially because they need long post-processing efforts in order to systematize collected data.Furthermore, with the recent transition towards the BIM methodology for building management also modeling building objectsboth in their geometric features and in their related information is a long process and error-prone task. Under these circumstancesthe possibility of performing the majority of operation on-site would definitely make the process more efficient and it would reduceerrors. Augmented Reality (AR) with its capability of overlapping digital data to the real scene is the right tool to support operatorson-site.The proposed system has the aim of reducing the time of secondary building assets survey and provide a tool for the automaticenrichment of BIM models. An AR device (Hololens) with an embedded computer and a neural compute stick constitute the portableon-site system for the automatic recognition of assets objects, removing the necessity of reworking data off site. A trained DeepLearning Neural Network inside the neural compute stick performs the recognition providing the operator with objects features andposition. The AR application inside the Hololens operates as an interface between the user and the digital information just created.Finally, data is stored in a NoSQL database linked to the BIM model so as to be available for further operations. The visuallysupporting information provided by the AR tool, the possibility of working on data directly on site and the portability of the systemrepresent means for increasing efficiency in survey operations. First tests have been conducted so as to prove the feasibility of thesystem and its use on site without further equipment
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
F. CornelI CvrtI [...] De clavis Dominicis liber.
No full textVingerafdruk: 163412 - # a1 ã3 n$ : # a2 e3 r - # b1 B eâ : # b2 N3 ristGegraveerde titelpagina, 18 gravures (A. Loemans fec.)Onvolledig f. L12 (gravure) en f. M1 (gravure) ontbrekenHerkomst: Bibliothecae Augustinianae Teneraemondae [Augustijnen Dendermonde]Herkomst: Bibliothecae August. Gand. [Augustijnen Gent] acquisitus ... 1695Bib. catholica Neerlandica impressa 8703Europeana-GoogleBook
Anaerobic digestion and Co-digestion of oleaginous Microalgae residues for biogas production
No full textMicroalgae have been suggested as one of the most promising feedstock for the production of bioenergy and biofuels, including biodiesel and aviation fuels, because of the high oil content of selected species. In the context of biofuel production from microalgae, anaerobic digestion of microalgal biomass residues after oil extraction has the potential to make the process more sustainable and increase the energy efficiency. The main goal of this study was to assess microalgae residues as substrates for anaerobic digestion and investigate their potential for biomethane production. Biochemical Methane Potential (BMP) tests were carried out on a microalgal species, Nannochloropsis gaditana, selected for its high oil content and fast growth rate. The methane potentials observed for the microalgae residue after lipid extraction were higher than those recorded for the raw microalgae samples. Co-digestion with cellulose did not clearly enhance the anaerobic digestion performances
Training of YOLO Neural Network for the Detection of Fire Emergency Assets
No full textBuilding assets surveys are cost and time demanding and the majority of current methods still rely on manual procedures. New technologies could be used to support this task. The exploitation of Artificial Intelligence (AI) for the automatic interpretation of data is spreading throughout various application fields. However, a challenge with AI is the very large number of training images required for robustly detect and classify each object class.
This paper details the procedure and parameters used for the training of a custom YOLO neural network for the recognition of fire emergency assets. The minimum number of pictures for obtaining good recognition performances and the image augmentation process have been investigated. In the end, it was found that fire extinguishers and emergency signs are reasonably detected and their position inside the pictures accurately evaluated. The use case proposed in this paper for the use of custom YOLO is the retrieval of as-is information for existing buildings. The trained neural networks are part of a system that makes use of Augmented Reality devices for capturing pictures and for visualizing the results directly on site
[Newspaper Clipping: Author Claims Evidence of Second JFK Assassin #1]
No full textNewspaper article titled "Author Claims Evidence of Second JFK Assassin." The article states that author Richard J. Whalen concluded "that there is circumstantial evidence to support the theory of a second assassin in the shooting of President John F. Kennedy.
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